Selecting cam for knitting machines



March 31, 1925. 1,531,524'

K. P. SWANSTROM sancrms om Fox KNITTING MACHINES Filed April s, 1922 /l u f 'lllllllllllllll INVENTOR BY ATTORNEY Patented Mar. 31, 1925.

KONRAD P. SVIANSTROM, 0F SEATILE, VJ'ASHINGTON.

snnnc'riiie CAM Fon KNrr'iiNe iviiicrrriirns.-

Application led April 3,

To @ZZ fai/mm t may concern.'

Be it known that I, KONRAD P. SWAN- srnoar, a citizen of the United States, residing at Seattle, county ot lKing and State of llilashington, have invented new andusetul Improvements in Selecting Cams for Knitting Machines; and I do hereby declare that the following isa full, clear, and exact specitication, such as Will enable others skilled in the art to which they appertain to make and use the same. f n

The invention is adevice which may be attached to knitting machines Which Will make it possible toraise every alternate pair of needles or one or any number of needles and skip any number ot needles so that several different colors of yarn may be knitted into one piece of goods in any desired design. i

' The object of the invention is to provide a small cam which may replace the needle raising lever on a circular knitting machine so that alternate pairs of needles may be raised instead of all of them.

Another object of the invention is to provide a small cam Which may be pivotally mounted in the track of a flat knitting machine so that tivo or any number ot' needles may beraised at given intervals.

And a further object of the invention is to provide a small cam which may be attached to the guides of a circular knitting machine which will make it possible to raise some ot' the needles at regliilar intervals in order to knit different colored yarn into one piece of material with each ot the ditlerent colors forniiiug ribs, without the use of additional attm'hnients as is non' required.

lVith these ends in view the invention cinbodics a l'iat piece oft circular material with a hole thru it having a prong on one side and a small projection at a point on the other side which would be at an angle ot about 90 degrees 'from the centerline of the prong.

Other features and advantages of the invention Will appear from the 'following description taken in connection with the drawings, wherein Figure l is a side elevation ot a unit ot a circular knitting machine With parts broken away.

Figure 2 is a large detail ot the cam in the act of raising two of the needles.

Figure 3 is a similar detail shoi'siing the cani raised to miss the third needle.

1922. serial No. 549,350.

Figure l is a similar detail showing the cam in the act of discharging the needles.

lFigure 5 ris a similar detailfshovving the cam returned to its normal position.

Figure 6 is an alternate arrangement showing the cam attached to a flat machine. In the drawings I have shown my device as it Would be installed lon a circular knitting machine in Figure l wherein numeral l indicates the hub otthedevice which has a hole 2 .in its center,a prong 3011 one side, and a projection Llat about right angles to the prong. This device may be attached to a standard post such vas vI have shoWn'inf Figure 1 VWith'the top `in dotted lines and indicated by the numeral 5, by placing it on the end of a small'rod Whichmay. project thru a hole in the post and Which may have a spring on its outer Aend to return the deviceto the position shown. lIn the presentconstruction a lever 6 is placed upon the` end of this small rod and the spring holds it down constantly so that it Willfraiseall of theneedles and in its normal position it would be in about the same position as the' prong 3 of my device.: In Figure lv Ivliave shovgn another the post 52L set ahead and reversed the lever `6 so that it rwill hold the needles down as they approach my device,"

will beipseen that as the cam shaped moves to the right :the buttsv of two will refer to the butts of the needles passing s by the device with consecutive numerals. )In Figure 2 the device 1s in the same position as shown in Figure l wherein the butts 10 and l1 have been forced up the inclined surico icfi

in Figure et. In the next movement the butt 11 will act against the projectiont and cause the prong '3 to raise which will permit the butt 13 to pass under it as did the butt 12v in the previous movement. Then as there are no other butts on the incline to operate the device it will remain in the posit-ion butts 12 and 13 when the butts l() and 11 were acting against. the projection 4. As this operation is continued it will be seen .that every alternate pair of butts will be raised while the balance willdrop down and pass under the device and as onev color of Y yarn is fed to the needles the two needles whose butts have been raised will come up and take the yarn; and by placing any number of these 4devices around the circle with a different color of yarn for' each one it will' be possibleto knit ya piece of material with different colored ribs in it. It willbe. seen that as this device may beinstalled in any machine andv inthe same place as that now occupied by the lever 6 and may be placed on the same rod so that itk will be operated by the same spring the processv of insta-lling it will be very simple.

I have shown an alternate arrangement in- Figure 6 which shows howthe device may l be used on flat machines and altho I have only shown one type. it is'understood that the same principle may be used for all machines, by slightly changing its construction to meet the requirements of the different designs. In this design I have shown a slot 1G-cut in the end of the guide 17 and a hole 18 drilled thru it.. A lever 19liaving a pro- `iection 20 on it may be pivotally mounted in the slot on a pin 21 inthe holes 18 and it will be' seen that as two of the butts pass upon the lever they will act-upon the projection 20 andl cause the lever to raise to the position shown in dotted lines so that it will allow the next two butts to pass by, which action will be exactly rsimilar to that of the device for circularl machines: hereinbefore described. v

It Vwill be seen` that changes may be made in they construction' without departingfrom the spirit of the invention, as the design of the device may be slightly changed or its location in the ringv may be alteredv in Ord-er to produce different designs and a diiierent mea-ns may be usedy for supportingv it.` lIt will also be seen that its constructionv will have to bek considerably changed to fit ditferent styles of flat machines and it mayalso be' changed so that it-will raise. one needle instead: of two atwhich time' it may permit any number of needles to pass under it or it may be altered so that it will raise any number of needles and let any number of needles pass under it.

Having thus fully described the invention what I claim' is new and` desire tov secure by Letters Pfatent is f y Y A device of the tlypefdescribed embodying a fiat circular piece of material; a prong extending from one side of the material; a small projection at the top of the piece of mate-rial; aA smooth curvedi'su'rfacefrom the end `of the prong to `the projection; and a 

